CVE-2011-4859: The Schneider Electric Quantum Ethernet Module, as used in the Quantum 140NOE771* and 140CPU65* modules, th...

Security readout for executives and security teams

This CVE concerns hardcoded passwords in Schneider Electric industrial Ethernet modules. If reachable, a remote attacker may gain access through exposed management or debug services. For executives, the main risk is unauthorized access to operational technology equipment, especially where these modules bridge plant networks and engineering workstations. Exposure is most likely in industrial environments using the named Schneider module families with Telnet, FTP, or WindRiver Debug reachable from untrusted networks. Risk is lower when these services are disabled, filtered, or confined to isolated engineering networks. Treat as a priority OT exposure review, especially for facilities with Schneider controllers on routable networks. The issue is old, but hardcoded credentials can persist for years in industrial assets with long replacement cycles. Mitigation focus: Inventory affected Schneider Quantum, Premium, M340, and STB DIO modules.; Restrict Telnet, FTP, and WindRiver Debug access to trusted engineering networks.; Remove any internet exposure for affected industrial control modules..

Prepared

Jun 27, 2026, 17:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.